package chapter04.example6;
//定义Animal类
class Animal{
    private String name;
    private int age;
    public Animal(String name,int age){
        this.name = name;
        this.age = age;
    }
    public String getName (){
        return name;
    }
    public void setName(String name){
        this.name = name;
    }
    public int getAge(){
        return age;
    }
    public void setName(int age){
        this.age = age;
    }
    public String info(){
        return "名称:"+this.getName()+",年龄:"+this.getAge();
    }
}
//定义Dog类继承Animal类
class Dog extends Animal{
    private String color;
    public Dog(String name,int age,String color){
        super(name, age);
        this.setColor(color);
    }
    public String getColor(){
        return color;
    }
    public void setColor(String color){
        this.color = color;
    }
    //重写父类的info()方法
    public String info(){
        return super.info()+",颜色："+this.getColor();//扩充父类中的方法
    }
}
//定义测试类
public class Example6 {
    public static void main(String[] args){
        Dog dog = new Dog("牧羊犬",3,"黑色");//创建Dog类的实例对象
        System.out.println(dog.info());
    }
}